<template>
  <div>
    <div class="search">
      <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
    </div>
    <div class="search-content" ref="search" v-show="keyword">
      <ul>
        <li class="search-item border-bottom" 
        v-for="item of list" 
        :key="item.id"
        @click="handleCityClick(item.name)"
        >{{item.name}}</li>
        <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
      </ul>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapMutations} from 'vuex'
export default {
  name:'CitySearch',
  props:{
    cities:Object
  },
  data () {
    return {
      keyword:'',
      list:[],
      timer:null
    }
  },
  computed:{
    hasNoData () {
      return !this.list.length
    }
  },
  watch:{
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(()=>{
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 ||
            value.name.indexOf(this.keyword) >-1 ) {
              result.push(value)
            }
          })
          
        }
        this.list = result
      },100)
    }
  },
  methods:{
    handleCityClick (city) {
      //这行代码和下面那行代码意思一样this.$store.commit('changeCity',city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.search)
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
    height :.72rem
    padding :0 .1rem
    background : $bgColor
    .search-input
      box-sizing :border-box
      width:100%
      height:.62rem
      padding: 0 .1rem
      line-height:.62rem
      text-align:center
      border-radius:.06rem
      color :#666
  .search-content
    z-index :1
    overflow :hidden
    position :absolute
    top:1.58rem
    left :0
    right :0
    bottom :0
    background :#eee
    .search-item
      line-height :.62rem
      padding-left :.2rem
      background :#fff
      color :#666
</style>


